A particle moves with its position given by [math] and [math], where positions are given in feet from the origin and time [math] is in seconds.

Find the speed of the particle.
Speed =
(include units)

Find the first positive time when the particle comes to a stop.
[math]
(include units)

If [math] is any odd integer, write a formula (in terms of [math]) for all positive times [math] at which the particle comes to a stop.
[math]
(include units)